c-Jun is a JNK-independent coactivator of the PU.1 transcription factor.
Authors:Behre G; Whitmarsh A J; Coghlan M P; Hoang T; Carpenter C L; Zhang D E; Davis R J; Tenen D G;
Journal:J Biol Chem
PubMed ID:9988737
The ETS domain transcription factor PU.1 is necessary for the development of monocytes and regulates, in particular, the expression of the monocyte-specific macrophage colony-stimulating factor (M-CSF) receptor, which is critical for monocytic cell survival, proliferation, and differentiation. The bZIP transcription factor c-Jun, which is part of the AP-1 transcription factor ... More
Receptor-selective effects of endogenous RGS3 and RGS5 to regulate mitogen-activated protein kinase activation in rat vascular smooth muscle cells.
Authors:Wang Qin; Liu Min; Mullah Bashar; Siderovski David P; Neubig Richard R;
Journal:J Biol Chem
PubMed ID:12006602
Regulators of G protein signaling (RGS) proteins compose a highly diverse protein family best known for inhibition of G protein signaling by enhancing GTP hydrolysis by Galpha subunits. Little is known about the function of endogenous RGS proteins. In this study, we used synthetic ribozymes targeted to RGS2, RGS3, RGS5, ... More
The large size (six membrane-spanning repeats in each of four domains) and asymmetric architecture of the voltage-dependent Na+ channel has hindered determination of its structure. With the goal of determining the minimum structure of the Na+ channel permeation pathway, we created two stable cell lines expressing the voltage-dependent rat skeletal ... More
Vesicle-associated membrane protein-2/synaptobrevin binding to synaptotagmin I promotes O-glycosylation of synaptotagmin I.
Authors:Fukuda M.
Journal:J Biol Chem
PubMed ID:12048209
Synaptotagmin I (Syt I), an evolutionarily conserved integral membrane protein of synaptic vesicles, is now known to regulate Ca2+-dependent neurotransmitter release. Syt I protein should undergo several post-translational modifications before maturation and subsequent functioning on synaptic vesicles (e.g. N-glycosylation and fatty acylation in vertebrate Syt I), because the apparent molecular ... More
Extracellular Export of Sphingosine Kinase-1 Enzyme. SPHINGOSINE 1-PHOSPHATE GENERATION AND THE INDUCTION OF ANGIOGENIC VASCULAR MATURATION.
Authors:Ancellin Nicolas; Colmont Chantal; Su Joseph; Li Qin; Mittereder Nanette; Chae Sung-Suk; Stefansson Steingrimur; Liau Gene; Hla Timothy;
Journal:J Biol Chem
PubMed ID:11741921
The enzyme sphingosine kinase (SK) catalyzes the formation of sphingosine 1-phosphate (S1P), a bioactive lipid that acts extracellularly on G protein-coupled receptors of the S1P(1)/EDG-1 subfamily. Although S1P is formed in the cytosol of various cells, S1P release is not understood and is controversial because this lipid mediator is also ... More